Exploring Tepui evolution: phylogenomics of Bonnetia using Angiosperms353 probe set

Resumen

The Pantepui biogeographic province is a critical center for angiosperm diversification, with the rocky tepui formations hosting Bonnetia forests renowned for their high phylogenetic diversity. The genus Bonnetia comprises 26 endemic species from Pantepui. This study presents the first detailed phylogenomic and biogeographic analysis of Bonnetia using the Angiosperms353 probe set, along with an updated taxonomic review, aiming to clarify species classification and enhance understanding of their evolutionary history. The study analysed approximately 1,400 specimens from international herbaria, identifying 25 species in Pantepui, proposing two new synonyms, conducting 15 lectotypifications, designating a neotype, and describing a new species endemic to Ayanganna tepui, Guyana. Phylogenomic data confirmed the monophyly of Bonnetia, with its family originating approximately 111 million years ago. However, the diversification of Bonnetia in the tepuis occurred more recently, around 18 million years ago, likely driven by geological and climatic changes. This work integrates phylogenomic and taxonomic methods, offering a clearer perspective on the unique flora of the tepuis. It provides a robust foundation for understanding Bonnetia's diversity and evolution, supporting conservation efforts in this biodiversity hotspot.

Citation: Barbosa-Silva, R.G., Torke, B.M. & Viana, P.L. 2025. Exploring Tepui evolution: phylogenomics of Bonnetia using Angiosperms353 probe set. Revista Jard. Bot. Nac. Univ. Habana 46(Número especial 1): 130.

Trabajo presentado en el XIII Congreso Latinoamericano de Botánica. Modalidad de Poster.